I purchase curriculum which we use during daycare hours. I buy for 5 kids, one being my own child. I would not purchase this if it wasnt for daycare. Can I claim the entire cost of the curriculum or do I need to subtract out my own childs portion?

If you are only using the curriculum during day care hours then you can deduct 100% of the cost. If you are using it with your child after day care hours, deduct 80% of the cost (one personal and 4 business children).